Figure 1.

Effect of SPP concentration on the production of chitosanase, protease and αGI by Paenibacillus sp. TKU042. (A) chitosanase activity; (B) protease activity; (C) αGI activity. Paenibacillus sp. TKU042 has been reported to produce higher αGI activity in deCSP than any of the other three chitinous materials (SPP, deSSP and SHP) when used as the sole C/N source [17]. To examine whether the production of chitosanase (1.5% SPP) and protease (0.5% SPP) may be enhanced by a combination of deCSP and SPP, 1% deCSP was added to the medium. As seen in Figure 2, the combination of SPP with deCSP enhanced the production of protease (Figure 2B), but not chitosanase (Figure 2A) or αGI (Figure 2C).